Feasibility of use of landslide maps for assessing catastrophic landslides

Abstract

Many catastrophic landslides occurred in the Kii Peninsula, following typhoon No. 12, 2011. Some of them occurred in areas had been labeled as landslides in the landslide map published by National Research Institute for Earth Science and Disaster Prevention (NIED). A comparison of 20 catastrophic landslides with areas greater than 0.01 km² and the landslide map for the Kii Peninsula, showed that 12 of these landslides had occurred in areas or parts of areas labeled as landslides. Moreover, 7 out of 8 catastrophic landslides with areas greater than 0.1 km² coincided with areas labeled as landslide in the landslide map. This research showed that the potential area of catastrophic landslides could be determined by analyzing geographical features using tools such as the landslide maps published by the NIED.